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December 13, 2017, 09:12:32 PM

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AuthorTopic: What heads for 318? (Read 2070 times)

I assume the rockers and valves and stuff get dissasembled before the heads go to the shop. Does the small stuff get tanked as well?

The odometer in the 5th ave read 37K. The motor seemed awfully sludgy for that, but the rest of the car seemed awfully nice for it to be 137K. The "Big Band" cassette case on the floor would seem to indicate the former owners were older folks (or Mobby has a twin here in Michigan) D Cluley2008-07-11 22:55:46

If you swap on a set of 360 heads, you can use a better intake like the Edelbrock Performer and use a 4bbl. (The intake holes are too large on those to use with stock 318 heads.) You will also have better exhaust flow.

Dan, the pushrods from your motor will work. Rockers are the same for the flat-tappet & roller 318's too. Roller motors have the roller lifters, dogbones to keep them in alignment, a "Spider" plate that keeps the dogbones in place & shorter pushrods. Some roller blocks came with regular Hydraulic cams & it's the same valvetrain as any 318 non-Magnum.

I just built Nephews new 85 318 roller 318 & used the 302's that came with it with new Hydraulic lifters & a Summit cam & used the old 75 motors pushrods & rocker assy's. Also used the timing cover/balancer & oil pan from the 75 motor.

The only extra thing to do to those heads as said is to plug the A.I.R ports under the exhaust ports with allen set screws & locktite. I used 1/4-20 set screws & just had to drill & tap.

If they're every 318 head Ive' seen with miles on it the guides will be worn & the valve seals shot ( biggest oil use culpirt ) . You can get by cheap by cleaning yourself & if you can borrow/rent/buy a valvespring tool you could hand-lap the valves yourself & put on new valveseals ( I'll send ya a set if ya want ..I think I have about 3 sets of Umbrella-type seals ) . Been there done that for a cheap fix that lasted quite a few miles.

Or...since they're a better head anyway....do like Lea said &have them cleaned & magged & have the guides checked & or replaced, new seals & a valvejob done professionally & they'll last another 100K.

Yeah "hand lap" thats the other thing I couldn't think of Thats what you do with the suction cup on a stick and the abrasive paste. I know what I mean if anyone understands me then that would be scary!!!